Mozilla released another beta, and hopefully the last one before Firefox 3.1 hits is final version as Firefox 3.5.

Here is the change log from Beta 2:

Firefox 3.1 Beta 3 is based on the Gecko 1.9.1 rendering platform, which has been under development for the past 9 months. Firefox 3.1 is an incremental release on the previous version with significant changes to improve web compatibility, performance, and ease of use:

This beta is now available in 64 languages - get your local version.

Improved the new Private Browsing Mode.

Improvements to web worker thread support.

Improved performance and stability with the new TraceMonkey JavaScript engine.

New native JSON support.

Improvements to the Gecko layout engine, including speculative parsing for faster content rendering.

Support for new web technologies such as the <video> and <audio> elements, the W3C Geolocation API, JavaScript query selectors, CSS 2.1 and 3 properties, SVG transforms and offline applications.